Pulp-web cutter



ATTORNEYS.

Aprll 19,1927. w. A. KELLY PULP was CUTTER Filed March 8, 1926 WILL/HM f7 KELLY Patented Apr. 19,1927.

UNITED-STATES PAT-ENT OFFICE.

a may, or enema BAY, wrsconsm, Assrenoa or one-mm ro rmx J. TIHIERMAN, or GREEN BAY, wrsconsm.

rear-wan CUTTER.

Application fled may a, 1926. Serial No. 98,187.

The invention relates to a lap cutting or severing attachment for pulp machines, andmore especially to the class of pulp web cutters deslgned primarily for use on that type of machines for converting pulp into sheets set forth in Letters Patent No. 1,005,655,

- transversel dated October 10, 1911.

The primary object of the invent on is the provision of a cutter of this character, wherein the ulp lap when passing through the-pulp we machine will be provision of a cutter of this character,

wherein the pulp web when traveling through the pulp machine will not be entirely broken or cut transversely at the predetermined intervals, thereby enabling such web to pass over the gap between the press rolls of the machine, and subsequently severed into sheets by the pull rolls-of the latter. A further object of the invention is the provision of a cutter of this character, wherein sheets of uniform length will be formed from the pulp web when passing through the wet) machine, and delivered from the latter, without the-necessity of having the pulp gathering cylinder of such machine provided with transversely disposed imporous weakener portions or stretches.

A still further object of the invention is the provision of a cutter of this character, which is extremely simple in constructlon, throughly reliable and efiicient in its oper'a tion, readily and easily mounted upon the pulp web machine, and inexpensive to manufactnre and install.

With these and other objects in view, the

invention consists in the features of construction, combination and arrangement of parts, as will be hereinafter more fully described in detail, illustrated in the accom-' panyng drawing, and pointed out in the claims hereunto appended. v

In the accompanying drawing: Figure 1 is a diagrammatic view and in substantially sectional elevation of the com- (perforated of the web at pre etermined' the cutter constructed in accordance with the invention in co-operative position.

Figure 2 is an enlarged fragmentarfvertical transverse sectional-view through the Pulp web machine, showing i elevation the Figure 4 is a fragmentary detail perspective view of the perforated pulp web.

Similar reference characters indicate corresponding parts throughout the several views in the drawin Referring to the drawing in detail, particularly Figure 1, thereof, there is diagrammatically shown a pulp gathering cylinder 5,' while some distance in, advance of and elevated relative thereto are superposed squeezing rolls 6, and 7;, also likewise mounted between the. said cylinder 5, and the rolls 6, and 7, is a relatively smaller pair of squeezing rolls 8, and 9, and at intervals apart distanced from said squeezing rolls are upper and lower series of guide rollers 10, and 11, respectively.

Immediately-above the gathering cylinder 5, is a pressing roller 12, which has trained about the same an endless belt or apron 13, the same eing passed over the lower series of guide rollers 11, and between the squeezing rolls 7, and 9, while trained over the upper series of guide rollers 10, and between the squeezing rolls 6, and 8, is an 1 endless belt or apron 14, the latter being spectively, the upper belt or apron being trained over guide rollers 19, while the lower belt or apron is likewise trained. overguide rollers 20, and forwardly of these squeezing rolls 15, and 16, with their peripheral portions at substantially the same level,

. are tension breaking rollers 21.

A table 22, for receiving the sheets shown to be downwardly and outwardly inclined from the wet machine 'ust forwardly ponents of thepulp web machine,showing ofthe lower tension breakmg roller 21.

The wet machine hereinbefore generally described and diagrammatically shown 1n Figure 1, of the drawing, forms no part of the present invention, and the details thereof are clearly disclosed in Letters Patent No. 1,005,655, issued October 10, 1911.

The present invention on the pulp web cutter, comprises a pair of substantially U- shaped elements in the form of frames 22', with their outer ends 23, closed. These frames 22' are formed with eye terminals 24, embracing a shaft 25, common to both frames, the latter being arranged side-byside, and at diametrically opposite sides of the said shaft. These frames 22' havetheir eye terminals 24, made fast to the shaft 25, in any suitable manner.

The shaft 25, is ournaled in suitable standards 26, vertically disposed and made fast to the frame sup orting structure of the wet machine, while Xed to one end of the shaft 25, is a belt pulley 27, over which is adapted to be trained a suitable belt (not shown) havingconnection with the driven parts of the wet machine, so that the shaft will be operated in unison with the latter.

On each frame 22, at its outer closed end 23, is a blade 28, having its outer edge serrated to provide spaced outwardly projecting beveled cutting teeth 29, which protrude beyond the closed side of each frame, so as to penetrate the pulp lap or web 30, to form perforations 31, therein, gs is clearly shown in Figure 4, of the drawing, when such lap or web passes between the frames 22 and 23, in their active position and the pressing roller 12, of the wet machine.

The pulp gathering cylinder 5, as usual is formed with a central circumferential m1- porous pulp weakener portion 32, the same being arranged longitudinally to the web of pulp which the cylinder gathers in its rotation. Accordingly, the pulp collected by the cylinder 5, along this line will be relatively thinner and consequently weaker than at other points of the cylinder, so that the lap or web can be separated into strips longitudinally, while the cutters with the teeth 29,. will perforate said strips at intervals transversely, to enable separated sheets to be formed at the delivery end of the wet machine.

The tension breaking rollers 21, are driven to revolve at a relatively greater peripheral speed than the peripheral speed of the squeezing rolls 15, and 16, so that the perforated strips of the lap or web 30, will waItllll1illillill\Wlllullllluuihm illllhlmllllll lllllllllli llllllliiiifllllllllllllllllllllllwlwlillillu1iillllllllllllllllllllllllllhlllilllinlltlhll\llllllllu be separated by said rollers 21, along the lines of the perforations 31 to separate the said lap or web into individual sheets.

The sheets as they emerge from the rollers 21, are discharged onto the table 22, where a number of sheets may be collected without requiring the. attention of the operator of the machine.

By the use of the cutters to transversely perforate .as at 31, the pulp web or lap 30, the latter is formed with ties 32, between said perforations, so as. to retain each strip as a unit, to enable the web or lap to pass over the gap between the belts or aprons 13, and 15, at the rear and forward ends of the wet machine.

What is claimed is:

1. The combination with a pulp web carrier, of a cutter device, comprising opposed means for perforating the web revoluble about an axis transversely of, and adjacent to, the plane of movement of the carrier.

2. A cutter of the character described, comprising opposed means adapted to be mounted relative to a pulp web carrier and movable alternately in succession to perforate a web transversely of its length at intervals thereof during the travel of the same upon said carrier.

3. cutter of the character described, comprising opposed means adapted to be mounted relative to a pulp web carrier and movable to alternately perforate a web transversely of its length at intervals thereof during the travel of the same upon the carrier, and means for operating the firstnamed means simu taneously with the carrler.

4. .The combination with a pulp web carrier, of a cutter device, comprising a shaft supported elevated above the carrier, opposed framesv fixed to the shaft, cutting blades on the frames, and each having a serrated cutting edge for perforating the tion of travel thereof, and means for operating the shaft.

In testimony whereof I afiix my signature.

WILLIAM A. KELLY. 

